\begin{table}[htbp]\centering
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\caption{Total Household Adult Income\label{income99\_lvl\_ITT}}
\begin{tabular}{l*{2}{c}}
\toprule
                    &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}\\
                    &\multicolumn{1}{c}{Total household adult income}&\multicolumn{1}{c}{Total household adult income}\\
\midrule
Pooled              &         -47         &                     \\
                    &        (89)         &                     \\\addlinespace
Secured             &                     &         -96         \\
                    &                     &       (113)         \\\addlinespace
Surprise Unsecured  &                     &           2         \\
                    &                     &       (101)         \\\addlinespace
Unsecured           &                     &         -67         \\
                    &                     &       (100)         \\\addlinespace
Constant            &        1449\sym{***}&        1449\sym{***}\\
                    &        (80)         &        (80)         \\
\midrule
Observations        &        1857         &        1857         \\
\bottomrule
\end{tabular}
\end{table}
